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利用2014年8月1至16日AMSR-2一个观测周期的资料详细分析了日本、中国及周边地区陆地上7.3 GHz观测,研究结果表明:日本7.3 GHz通道无线电频率干扰主要来源于视场反射的静止电视/通信卫星下发信号。除7.3 GHz外,日本6.9 GHz和10.65 GHz也存在无线电频率干扰(RFI)影响,主要来自长期稳定的离散地面固定源。越南全境内每天不论是升轨还是降轨7.3 GHz都观测到很强的RFI。中国主要是7.3 GHz和10.65 GHz通道观测受污染,这两个频率受RFI影响的地域与中国地基雷达站点分布吻合一致。
Based on the data of AMSR-2 observation period from January 1 to August 16, 2014, the 7.3 GHz observations of terrestrial in Japan, China and the surrounding areas are analyzed in detail. The results show that the radio frequency interference of 7.3 GHz channels in Japan mainly comes from the reflection of the field of view Static television / communications satellite signals. In addition to 7.3 GHz, there are also radio frequency interference (RFI) effects at 6.9 GHz and 10.65 GHz in Japan, mainly from long-term stable discrete ground sources. A strong RFI was observed daily at 7.3 GHz throughout the territory of Vietnam, both ascending and descending. China is mainly contaminated by observations at 7.3 GHz and 10.65 GHz, and the two regions affected by RFI are consistent with the distribution of ground-based radar stations in China.